if (!window.ace) {
	window.ace = {};
}
ace.localData = {
     hname:location.hostname?location.hostname:'localStatus',
         isLocalStorage:window.localStorage?true:false,
         dataDom:null,
 
         initDom:function(){ //初始化userData
         if(!this.dataDom){
             try{
                 this.dataDom = document.createElement('input');//这里使用hidden的input元素
                 this.dataDom.type = 'hidden';
                 this.dataDom.style.display = "none";
                 this.dataDom.addBehavior('#default#userData');//这是userData的语法
                 document.body.appendChild(this.dataDom);
                 var exDate = new Date();
                 exDate = exDate.getDate()+30;
                 this.dataDom.expires = exDate.toUTCString();//设定过期时间
             }catch(ex){
                 return false;
             }
         }
         return true;
     },
     set:function(key,value){
         if(this.isLocalStorage){
             window.localStorage.setItem(key,value);
         }else{
             if(this.initDom()){
                 this.dataDom.load(this.hname);
                 this.dataDom.setAttribute(key,value);
                 this.dataDom.save(this.hname)
             }
         }
     },
     get:function(key){
         if(this.isLocalStorage){
             return window.localStorage.getItem(key);
         }else{
             if(this.initDom()){
                 this.dataDom.load(this.hname);
                 return this.dataDom.getAttribute(key);
             }
         }
     },
     remove:function(key){
         if(this.isLocalStorage){
             localStorage.removeItem(key);
         }else{
             if(this.initDom()){
                 this.dataDom.load(this.hname);
                 this.dataDom.removeAttribute(key);
                 this.dataDom.save(this.hname)
             }
         }
     }
 }